_Description

This page provides links to the composite spectra created from the 2QZ.  Full details given in Croom et al. (2002).

Three types of composite are provided in ASCII format

• Full composite:        All 2QZ QSOs
• M_B-composites:       Binned in M _B
• M_B-z composites:    Binned in M_B and z

File Format

In each composite data file the columns are:

Column	Format
Wavlength (A)	F6.1
Normalized flux	E10.4
Error	E10.4
Quality	L1
Number of QSOs	I5
median MB	F6.2
median z	F6.4

Composite Spectra

Full Composite
Data	NQSO	File
2QZ survey	21102
MB Composites
Mag Bin	NQSO	File
-27.5<MB<-27.0	180
-27.0<MB<-26.5	585
-26.5<MB<-26.0	1432
-26.0<MB<-25.5	2483
-25.5<MB<-25.0	3524
-25.0<MB<-24.5	3679
-24.5<MB<-24.0	2999
-24.0<MB<-23.5	2023
-23.5<MB<-23.0	1452
-23.0<MB<-22.5	933
-22.5<MB<-22.0	740
-22.0<MB<-21.5	501
-21.5<MB<-21.0	292
-21.0<MB<-20.5	139
-20.5<MB<-20.0	49

MB -z composites
Bin	0.25<z<0.50	0.50<z<0.75	0.75<z<1.0	1.0<z<1.25	1.25<z<1.50	1.50<z<1.75	1.75<z<2.0	2.0<z<2.25	2.25<z<2.5
-27.5<MB<-27.0	-	-	-	-	-	-	-	-
-27.0<MB<-26.5	-	-	-	-	-
-26.5<MB<-26.0	-	-	-	-
-26.0<MB<-25.5	-	-	-
-25.5<MB<-25.0	-	-
-25.0<MB<-24.5	-	-
-24.5<MB<-24.0	-							-	-
-24.0<MB<-23.5	-						-	-	-
-23.5<MB<-23.0					-	-	-	-	-
-23.0<MB<-22.5					-	-	-	-	-
-22.5<MB<-22.0			-	-	-	-	-	-	-
-22.0<MB<-21.5			-	-	-	-	-	-	-
-21.5<MB<-21.0			-	-	-	-	-	-	-
-21.0<MB<-20.5		-	-	-	-	-	-	-	-